A comparison of cloudless sky erythemal ultraviolet radiation at two sites in southwest Sweden

Abstract

This case study examines the variability of ultraviolet erythemal radiation at two different but nearby locations in southwest Sweden. Data from two identical radiometers were analysed. One instrument sampled the urbanised environment of Gö teborg (latitude: 57.70°N, longitude: 12.00°E), while the second one sampled a rural site, Koster Island (latitude: 58.83°N; longitude: 11.00°E), some 143 km to the north. Both radiometers were intercompared during the field season, and one radiometer had its calibration traced to a WMO/STUK intercomparison performed in 1995. Only cloudless data for the period 1 April 1996 -30 September 1996 are examined in this study. Higher depletion was reported at Koster Island for the 4 days which were simultaneously cloudless at both sites. A cloudless model developed by Green et al.

An investigation of solar erythemal ultraviolet radiation in the tropics: a case study at four stations in Thailand

“…Measurements of EUV have mostly been conducted in mid-latitude locations or in temperate climate (McKenzie et al, 1991;Webb, 1991;Blumthaler et al, 1992;Frederick and Weatherhead, 1992;Krzyscin and Jaroslawski, 1997;Weihs and Webb, 1997;Foyo-Mereno et al, 1998;Nunez and Mhen, 1998;Cappellani and Kochler, 1999;Thorseth and Kjeldstad, 1999;Udelhofen et al, 1999;Dubrovsky, 2000;Ziemke et al, 2000;McKenzie et al, 2001;Bais et al, 2003;Murillo et al, 2003;Ogunjobi and Kim, 2004;Palancar and Toselli, 2004;Verdebout, 2004;Cordero et al, 2005;Kazantzidis et al, 2006;Seckmeyer et al, 2007). There is relatively limited information on EUV in the tropics, including Thailand (Bernhard et al, 1997;Roy et al, 1998;Ilyas et al, 1999;Kift et al, 2006).…”